Microsoft scrambles to patch a Defender security flaw called RoguePlanet

A week ago, the security researcher who goes by “Nightmare Eclipse” published information about RoguePlanet, a zero-day ...
Bleeping Computer

Microsoft warns of new Defender zero-days exploited in attacks

Update May 25, 04:19 EDT: CVE-2026-41091 is a Microsoft Defender local privilege escalation (LPE) flaw known as RedSun, and CVE-2026-45498 is known as UnDefend, a security flaw that can be exploited ...
Security

Corelight enhances network visibility and detection coverage with Microsoft Defender

Corelight today announced that data from Microsoft Defender for Endpoint and Microsoft Defender Vulnerability Management will now feed directly into Corelight's sensors. With these new insights, ...

Microsoft says you don’t need another email security tool; experts say, not so fast

New benchmark claims Microsoft Defender catches nearly all malicious email on its own, with integrated third-party tools ...
Fox News

Windows PCs at risk as new tool disarms built-in security

All modern Windows PCs come with Microsoft Defender built in. For the unaware, this tool is Windows’ native antivirus. Over time, it has matured into a reliable security tool capable of blocking a ...
Forbes

2 New Microsoft Defender Zero-Days Exploited—Patch Now Rolling Out

This voice experience is generated by AI. Learn more. This voice experience is generated by AI. Learn more. Microsoft and CISA confirm Defender zero-days exploited in the wild. Microsoft has started ...
CNET

Is Microsoft Defender Enough for Antivirus Protection? It Depends

Microsoft Defender offers great protection from malware -- but there are other online threats you might want to consider, too ...
Forbes

Now Microsoft Windows Defender Can Be Disabled By Hackers

Forbes contributors publish independent expert analyses and insights. Davey Winder is a veteran cybersecurity writer, hacker and analyst. There are a number of antivirus, anti-malware, and internet ...
Microsoft

Crypto Clipper uses Tor and worm-like propagation for persistence and control

Microsoft Threat Intelligence analyzed a cryptocurrency clipper campaign that combines clipboard theft, wallet replacement, ...
Bleeping Computer

June Windows Server updates break Microsoft 365 Defender features

Microsoft has confirmed that Windows Server updates from last month's Patch Tuesday break some Microsoft 365 Defender features that use the network data reporting service. Redmond describes Microsoft ...